Coffee Caffeine Content Calculator

Estimate the total caffeine in your coffee servings and see how it compares to the recommended daily limit of 400mg.

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Total Caffeine (mg) = Servings × Caffeine per Serving (by type)
2 cups of brewed coffee (95mg each) = 190mg total caffeine, which is 47.5% of the recommended daily limit.

How much caffeine is in a cup of coffee?

Caffeine content varies widely based on brewing method, bean type, and serving size. A typical 8oz cup of brewed coffee contains 80-100mg of caffeine, while espresso has about 63mg per shot (1oz). Robusta beans contain nearly twice the caffeine of Arabica beans.

What is a safe daily caffeine limit?

The FDA recommends up to 400mg of caffeine per day for healthy adults (about 4-5 cups of coffee). Pregnant women should limit intake to 200mg daily. Individual tolerance varies based on genetics, body weight, and consumption habits.

Does dark roast have more caffeine than light roast?

Contrary to popular belief, light roast coffee actually contains slightly more caffeine than dark roast. The roasting process reduces caffeine content, so longer roasting times result in marginally less caffeine per bean.

How long does caffeine stay in your system?

Caffeine has a half-life of 3-5 hours in most adults, meaning it takes that long for half the caffeine to be eliminated. It can take up to 10 hours for caffeine to completely clear your system, which is why afternoon coffee can disrupt sleep.